Barraza Madrigal José Antonio, Cardiel Eladio, Rogeli Pablo, Leija Salas Lorenzo, Muñoz Guerrero Roberto
The Electrical Engineering Department/Bioelectronics Section, Center for Research and Advanced Studies of the National Polytechnic Institute, Av. IPN 2508 Col. San Pedro Zacatenco, México D.F. C.P. 07360, Mexico.
Med Eng Phys. 2016 Aug;38(8):793-800. doi: 10.1016/j.medengphy.2016.04.011. Epub 2016 May 13.
The aim of this study is to assess the suitability of a micro-processing unit of motion analysis (MPUMA), for monitoring, reproducing, and tracking upper limb movements. The MPUMA is based on an inertial measurement unit, a 16-bit digital signal controller and a customized algorithm. To validate the performance of the system, simultaneous recordings of the angular trajectory were performed with a video-based motion analysis system. A test of the flexo-extension of the shoulder joint during the active elevation in a complete range of 120º of the upper limb was carried out in 10 healthy volunteers. Additional tests were carried out to assess MPUMA performance during upper limb tracking. The first, a 3D motion reconstruction of three movements of the shoulder joint (flexo-extension, abduction-adduction, horizontal internal-external rotation), and the second, an upper limb tracking online during the execution of three movements of the shoulder joint followed by a continuous random movement without any restrictions by using a virtual model and a mechatronic device of the shoulder joint. Experimental results demonstrated that the MPUMA measured joint angles that are close to those from a motion-capture system with orientation RMS errors less than 3º.
本研究的目的是评估运动分析微处理单元（MPUMA）用于监测、再现和跟踪上肢运动的适用性。MPUMA基于惯性测量单元、16位数字信号控制器和定制算法。为验证该系统的性能，使用基于视频的运动分析系统同步记录角度轨迹。对10名健康志愿者进行了上肢在120º全范围内主动抬高过程中肩关节屈伸的测试。还进行了其他测试以评估MPUMA在上肢跟踪过程中的性能。第一个测试是对肩关节三个运动（屈伸、外展内收、水平内外旋转）进行三维运动重建，第二个测试是在使用肩关节虚拟模型和机电装置执行肩关节三个运动后进行连续随机运动且无任何限制的情况下进行上肢在线跟踪。实验结果表明，MPUMA测量的关节角度与运动捕捉系统测量的角度接近，方向均方根误差小于3º。
